Optical transition and ionicity of C-60/amine charge-transfer complexes studied by optical spectroscopy

Citation
M. Ichida et al., Optical transition and ionicity of C-60/amine charge-transfer complexes studied by optical spectroscopy, CHEM P LETT, 310(3-4), 1999, pp. 373-378
Citations number
13
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
310
Issue
3-4
Year of publication
1999
Pages
373 - 378
Database
ISI
SICI code
0009-2614(19990903)310:3-4<373:OTAIOC>2.0.ZU;2-Q
Abstract
We have investigated absorption spectra of charge-transfer (CT) complexes o f C-60 with various aromatic amines with different ionization potentials. A n absorption band due to CT transition is observed in the visible region; w ith increasing ionization potential of amines, the peak energy shifts to th e higher energy side and the oscillator strength of CT transition increases . We extract degrees of charge transfer by analyzing the transition energy of the CT band as a function of ionization potential and Raman spectra. The experimental results show that the CT complexes studied here have a neutra l character in their ground state. (C) 1999 Elsevier Science B.V, All right s reserved.